The Sigma 20mm F1.8 EX DG Aspherical RF lens for Canon EF mount is a versatile and unique lens that holds significant appeal for photographers who enjoy capturing wide-angle shots with a fast aperture. Its construction and design offer both quality performance and aesthetic benefits, making it a worthy contender in the realm of wide-angle lenses.
The Sigma 20mm F1.8 sports a robust build quality that's characteristic of the EX series lenses. It's designed with a solid all-metal body, which gives it a professional feel. The lens has a nice weight to it, adding to the stability while shooting. Additionally, the large front element, coated with Sigma's Super Multi-Layer Coating, helps to minimize flare and ghosting, ensuring clearer images even in challenging lighting situations.
This lens excels at producing sharp images with vibrant colors. The F1.8 aperture allows for excellent low-light performance, making it suitable for various types of photography, including astrophotography and indoor events. The aspherical element contributes to reduced distortion, which is often a concern with wide-angle lenses, helping to maintain image integrity across the frame.
The autofocus system is relatively fast and accurate, although there might be instances of slower focusing in low-light conditions. It features a manual focus override, which is a convenient addition for those who prefer to have total control over their focus points. The lens has a minimum focusing distance of approximately 20 cm, allowing photographers to explore creative compositions with close-up shots as well.
The 20mm focal length makes this lens a great option for landscape, architecture, and street photography. Its wide angle provides expansive views, and when combined with the fast F1.8 aperture, allows for stunning depth-of-field effects.
The Sigma 20mm F1.8 EX DG Aspherical RF lens for Canon EF mount stands out as a strong choice for photographers looking for a high-performance wide-angle lens. Its combination of build quality, fast aperture, and excellent optical performance makes it an excellent addition to any camera bag. While it may have some minor downsides, the benefits far outweigh them, making it a worthwhile investment for both amateur and professional photographers alike.